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Ugo [173]
3 years ago
6

Give reasons on why soil is important? please help!! :)

Chemistry
1 answer:
Olenka [21]3 years ago
5 0
<span>Soil is a vital part of the natural environment. It is just as important as plants, animals, rocks, landforms, lochs and rivers. </span>
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After 3 half life periods you would have 5 grams of krypton left because half of 40 is 20 half of 20 is 10 and half of 10 is 5

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What is the mole ratio to correct balance the reaction below? __KBr + __Ca3N2--&gt; __CaBr2 + __K3N
jonny [76]

Explanation:

3CaBr2 + 2K3N → 6KBr + Ca3N2

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3 years ago
The compound trimethylamine, (CH3)3N, is a weak base when dissolved in water. Write the Kb expression for the weak base equilibr
Zina [86]

Answer:

Kb = [OH⁻] . [C₃H₉NH⁺] / [ C₃H₉N ]

Explanation:

The equation for the reaction of trimethylamine when it is dissolved in water is:

C₃H₉N  +  H₂O ⇄ C₃H₉NH⁺ + OH⁻   Kb

1 mol of trimethylamine catches a proton from the water in order to produce trimethylamonium.

It is a base, because it give OH⁻ to the medium

Expression for Kb (Molar concentration)

Kb = [OH⁻] . [C₃H₉NH⁺] / [ C₃H₉N ]

7 0
3 years ago
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Answer:

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Calculation of Original pH from Final pH after Titration A biochemist has 100 mL of a 0.10 M solution of a weak acid with a pKa
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Answer:

!

Explanation:

need it too^^

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